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                <h1 id="EverydayOneCat"><a href="#EverydayOneCat" class="headerlink" title="EverydayOneCat"></a>EverydayOneCat</h1><p>ps！</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/9bf5c45a5cd489e5e5e7a4d6c8d9b0f0a1061d1a.jpg@518w.jpg" alt="9bf5c45a5cd489e5e5e7a4d6c8d9b0f0a1061d1a.jpg@518w"></p>
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<h1 id="阿里云视频点播"><a href="#阿里云视频点播" class="headerlink" title="阿里云视频点播"></a>阿里云视频点播</h1><h2 id="1-简介"><a href="#1-简介" class="headerlink" title="1.简介"></a>1.简介</h2><p>阿里云视频点播（ApsaraVideo for VoD）是集音视频采集、编辑、上传、自动化转码处理、媒体资源管理、分发加速于一体的一站式音视频点播解决方案。</p>
<p>我们这里的使用场景主要是添加小节时需要上传课程的视频，用到阿里云的视频点播。</p>
<p>整体流程：</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/image-20210126134536829.png" alt="image-20210126134536829"></p>
<ul>
<li>用户获取上传授权。</li>
<li>VoD下发 上传地址和凭证 及 VideoId。</li>
<li>用户上传视频保存视频ID(VideoId)。</li>
<li>用户服务端获取播放凭证。</li>
<li>VoD下发带时效的播放凭证。</li>
<li>用户服务端将播放凭证下发给客户端完成视频播放。</li>
</ul>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/05-阿里云视频点播概念.png" alt="05-阿里云视频点播概念"></p>
<h2 id="2-服务端SDK"><a href="#2-服务端SDK" class="headerlink" title="2.服务端SDK"></a>2.服务端SDK</h2><p>sdk的方式将api进行了进一步的封装，不用自己创建工具类。我们可以基于服务端SDK编写代码来调用点播API，实现对点播产品和服务的快速操作。</p>
<p>官网快速入门：<a target="_blank" rel="noopener" href="https://help.aliyun.com/document_detail/57756.html">https://help.aliyun.com/document_detail/57756.html</a></p>
<h3 id="2-1安装"><a href="#2-1安装" class="headerlink" title="2.1安装"></a>2.1安装</h3><p>添加maven仓库的配置和依赖到pom</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
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    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>gson<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>2.8.2<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>com.aliyun<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>aliyun-sdk-vod-upload<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>version</span><span class="token punctuation">&gt;</span></span>1.4.11<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>version</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>安装非开源jar包</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/image-20210126135129076.png" alt="image-20210126135129076"></p>
<p>在本地Maven仓库中安装jar包：</p>
<p>下载视频上传SDK，解压，命令行进入lib目录，执行以下代码</p>
<pre class="line-numbers language-bash" data-language="bash"><code class="language-bash">mvn install:install-file -DgroupId=com.aliyun -DartifactId=aliyun-sdk-vod-upload -Dversion=1.4.11 -Dpackaging=jar -Dfile=aliyun-java-vod-upload-1.4.11.jar<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<h3 id="2-2初始化"><a href="#2-2初始化" class="headerlink" title="2.2初始化"></a>2.2初始化</h3><p>根据文档示例创建 AliyunVODSDKUtils.java</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">public class AliyunVodSDKUtils {
    
	public static DefaultAcsClient initVodClient(String accessKeyId, String accessKeySecret) throws ClientException {
		String regionId = "cn-shanghai";  // 点播服务接入区域
		DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);
		DefaultAcsClient client = new DefaultAcsClient(profile);
		return client;
	}
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="2-3获取视频播放凭证"><a href="#2-3获取视频播放凭证" class="headerlink" title="2.3获取视频播放凭证"></a>2.3获取视频播放凭证</h3><pre class="line-numbers language-java" data-language="java"><code class="language-java">/**
	 * 获取视频播放凭证
	 * @throws ClientException
	 */
@Test
public void testGetVideoPlayAuth() throws ClientException {

    //初始化客户端、请求对象和相应对象
    DefaultAcsClient client = AliyunVodSDKUtils.initVodClient(accessKeyId, accessKeySecret);
    GetVideoPlayAuthRequest request = new GetVideoPlayAuthRequest();
    GetVideoPlayAuthResponse response = new GetVideoPlayAuthResponse();

    try {

        //设置请求参数
        request.setVideoId("视频ID");
        //获取请求响应
        response = client.getAcsResponse(request);

        //输出请求结果
        //播放凭证
        System.out.print("PlayAuth = " + response.getPlayAuth() + "\n");
        //VideoMeta信息
        System.out.print("VideoMeta.Title = " + response.getVideoMeta().getTitle() + "\n");
    } catch (Exception e) {
        System.out.print("ErrorMessage = " + e.getLocalizedMessage());
    }

    System.out.print("RequestId = " + response.getRequestId() + "\n");
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="2-4获取视频播放地址"><a href="#2-4获取视频播放地址" class="headerlink" title="2.4获取视频播放地址"></a>2.4获取视频播放地址</h3><pre class="line-numbers language-java" data-language="java"><code class="language-java">/**
	 * 获取视频播放地址
	 * @throws ClientException
	 */
@Test
public void testGetPlayInfo() throws ClientException {

    //初始化客户端、请求对象和相应对象
    DefaultAcsClient client = AliyunVodSDKUtils.initVodClient(accessKeyId, accessKeySecret);
    GetPlayInfoRequest request = new GetPlayInfoRequest();
    GetPlayInfoResponse response = new GetPlayInfoResponse();

    try {

        //设置请求参数
        //注意：这里只能获取非加密视频的播放地址
        request.setVideoId("视频ID");
        //获取请求响应
        response = client.getAcsResponse(request);

        //输出请求结果
        List&lt;GetPlayInfoResponse.PlayInfo&gt; playInfoList = response.getPlayInfoList();
        //播放地址
        for (GetPlayInfoResponse.PlayInfo playInfo : playInfoList) {
            System.out.print("PlayInfo.PlayURL = " + playInfo.getPlayURL() + "\n");
        }
        //Base信息
        System.out.print("VideoBase.Title = " + response.getVideoBase().getTitle() + "\n");

    } catch (Exception e) {
        System.out.print("ErrorMessage = " + e.getLocalizedMessage());
    }

    System.out.print("RequestId = " + response.getRequestId() + "\n");
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="2-5测试本地文件上传"><a href="#2-5测试本地文件上传" class="headerlink" title="2.5测试本地文件上传"></a>2.5测试本地文件上传</h3><pre class="line-numbers language-java" data-language="java"><code class="language-java">/**
	 * 视频上传
	 */
@Test
public void testUploadVideo(){

    //1.音视频上传-本地文件上传
    //视频标题(必选)
    String title = "3 - How Does Project Submission Work - upload by sdk";
    //本地文件上传和文件流上传时，文件名称为上传文件绝对路径，如:/User/sample/文件名称.mp4 (必选)
    //文件名必须包含扩展名
    String fileName = "E:/共享/资源/课程视频/3 - How Does Project Submission Work.mp4";
    //本地文件上传
    UploadVideoRequest request = new UploadVideoRequest(accessKeyId, accessKeySecret, title, fileName);
    /* 可指定分片上传时每个分片的大小，默认为1M字节 */
    request.setPartSize(1 * 1024 * 1024L);
    /* 可指定分片上传时的并发线程数，默认为1，(注：该配置会占用服务器CPU资源，需根据服务器情况指定）*/
    request.setTaskNum(1);
    /* 是否开启断点续传, 默认断点续传功能关闭。当网络不稳定或者程序崩溃时，再次发起相同上传请求，可以继续未完成的上传任务，适用于超时3000秒仍不能上传完成的大文件。
        注意: 断点续传开启后，会在上传过程中将上传位置写入本地磁盘文件，影响文件上传速度，请您根据实际情况选择是否开启*/
    request.setEnableCheckpoint(false);

    UploadVideoImpl uploader = new UploadVideoImpl();
    UploadVideoResponse response = uploader.uploadVideo(request);
    System.out.print("RequestId=" + response.getRequestId() + "\n");  //请求视频点播服务的请求ID
    if (response.isSuccess()) {
        System.out.print("VideoId=" + response.getVideoId() + "\n");
    } else {
        /* 如果设置回调URL无效，不影响视频上传，可以返回VideoId同时会返回错误码。其他情况上传失败时，VideoId为空，此时需要根据返回错误码分析具体错误原因 */
        System.out.print("VideoId=" + response.getVideoId() + "\n");
        System.out.print("ErrorCode=" + response.getCode() + "\n");
        System.out.print("ErrorMessage=" + response.getMessage() + "\n");
    }

}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h2 id="3-项目整合"><a href="#3-项目整合" class="headerlink" title="3.项目整合"></a>3.项目整合</h2><h3 id="3-1创建视频点播微服务"><a href="#3-1创建视频点播微服务" class="headerlink" title="3.1创建视频点播微服务"></a>3.1创建视频点播微服务</h3><p>引入依赖（上面有）</p>
<p>application.properties：</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"># 服务端口
server.port=8003
# 服务名
spring.application.name=service-vod

# 环境设置：dev、test、prod
spring.profiles.active=dev

#阿里云 vod
#不同的服务器，地址不同
aliyun.vod.file.keyid=your accessKeyId
aliyun.vod.file.keysecret=your accessKeySecret

# 最大上传单个文件大小：默认1M
spring.servlet.multipart.max-file-size=1024MB
# 最大置总上传的数据大小 ：默认10M
spring.servlet.multipart.max-request-size=1024MB<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<blockquote>
<p>注：这里必须配置文件上传大小，否则由于tomcat默认上传大小为1MB，视频大小往往比这个大，会报tomcat下的错误</p>
</blockquote>
<p>启动类：</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@ComponentScan(basePackages={"com.atguigu"})
public class VodApplication {

	public static void main(String[] args) {
		SpringApplication.run(VodApplication.class, args);
	}
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="3-2常量和工具类"><a href="#3-2常量和工具类" class="headerlink" title="3.2常量和工具类"></a>3.2常量和工具类</h3><p>创建常量类ConstantPropertiesUtil.java读取配置</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Component
//@PropertySource("classpath:application.properties")
public class ConstantPropertiesUtil implements InitializingBean {

	@Value("${aliyun.vod.file.keyid}")
	private String keyId;

	@Value("${aliyun.vod.file.keysecret}")
	private String keySecret;

	public static String ACCESS_KEY_ID;
	public static String ACCESS_KEY_SECRET;

	@Override
	public void afterPropertiesSet() throws Exception {
		ACCESS_KEY_ID = keyId;
		ACCESS_KEY_SECRET = keySecret;
	}
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>复制阿里云初始对象工具类</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">public class AliyunVodSDKUtils {
	public static DefaultAcsClient initVodClient(String accessKeyId, String accessKeySecret) throws ClientException {
		String regionId = "cn-shanghai";  // 点播服务接入区域
		DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret);
		DefaultAcsClient client = new DefaultAcsClient(profile);
		return client;
	}
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h3 id="3-3后端接口"><a href="#3-3后端接口" class="headerlink" title="3.3后端接口"></a>3.3后端接口</h3><p>Controller：</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Api(description="阿里云视频点播微服务")
@RestController
@RequestMapping("vod/video")
@CrossOrigin
public class VideoController {
    @Autowired
    private VideoService videoService;

    //上传视频文件
    @PostMapping("upload")
    public R upload(MultipartFile file){
        //返回视频在阿里云唯一id
        String videoId = videoService.uploadVideo(file);
        return R.ok().data("videoId",videoId);
    }
    
    //根据视频id删除阿里云视频
    @DeleteMapping("delete/{id}")
    public R delete(@PathVariable String id){
        try {
            //初始化阿里云对象
            DefaultAcsClient client = AliyunVodSDKUtils.initVodClient(ConstantVodUtil.ACCESS_KEY_ID,
                    ConstantVodUtil.ACCESS_KEY_SECRET);
            DeleteVideoRequest request = new DeleteVideoRequest();
            //支持传入多个视频ID，多个用逗号分隔
            request.setVideoIds(id);
            //调用初始化对象实现删除
            client.getAcsResponse(request);
            return R.ok();
        } catch (ClientException e) {
            e.printStackTrace();
            throw new GuliException(20001,"删除视频失败");
        }
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>Service实现方法：（根据官方文档修改）</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Override
public String uploadVideo(MultipartFile file) {
    try {
        //fileName:上传文件的原始名称
        String fileName = file.getOriginalFilename();

        //title:上传之后显示的名称
        String title = fileName.substring(0,fileName.lastIndexOf("."));

        //inputStream:上传的文件流
        InputStream inputStream = file.getInputStream();

        UploadStreamRequest request = new UploadStreamRequest(ConstantVodUtil.ACCESS_KEY_ID,
                                                              ConstantVodUtil.ACCESS_KEY_SECRET, title, fileName, inputStream);

        UploadVideoImpl uploader = new UploadVideoImpl();
        UploadStreamResponse response = uploader.uploadStream(request);
        System.out.print("RequestId=" + response.getRequestId() + "\n");  //请求视频点播服务的请求ID
        String videoId = "";
        if (response.isSuccess()) {
            System.out.print("VideoId=" + response.getVideoId() + "\n");
            videoId = response.getVideoId();
        } else { //如果设置回调URL无效，不影响视频上传，可以返回VideoId同时会返回错误码。其他情况上传失败时，VideoId为空，此时需要根据返回错误码分析具体错误原因
            System.out.print("VideoId=" + response.getVideoId() + "\n");
            System.out.print("ErrorCode=" + response.getCode() + "\n");
            System.out.print("ErrorMessage=" + response.getMessage() + "\n");
            videoId = response.getVideoId();
        }
        return videoId;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/08-添加小节上传视频.png" alt="08-添加小节上传视频"></p>
<h3 id="3-4配置nginx"><a href="#3-4配置nginx" class="headerlink" title="3.4配置nginx"></a>3.4配置nginx</h3><p>将接口地址加入nginx配置</p>
<pre class="line-numbers language-nginx" data-language="nginx"><code class="language-nginx">location ~ /vod/ {           
    proxy_pass http://localhost:8003;
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span></span></code></pre>
<blockquote>
<p>文件上传用到nginx时要注意，除了在项目配置文件中配置大小限制不报tomcat的错，还需要再nginx配置中也配置nginx上传文件大小。</p>
</blockquote>
<p>配置nginx上传文件大小，否则上传时会有 413 (Request Entity Too Large) 异常</p>
<pre class="line-numbers language-nginx" data-language="nginx"><code class="language-nginx">client_max_body_size 1024m;<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/image-20210126143555651.png" alt="image-20210126143555651"></p>
<p>重启：nginx -s reload</p>
<h3 id="3-5前端实现"><a href="#3-5前端实现" class="headerlink" title="3.5前端实现"></a>3.5前端实现</h3><p>整合上传组件：</p>
<pre class="line-numbers language-vue" data-language="vue"><code class="language-vue">&lt;el-form-item label="上传视频"&gt;
    &lt;el-upload
           :on-success="handleVodUploadSuccess"
           :on-remove="handleVodRemove"
           :before-remove="beforeVodRemove"
           :on-exceed="handleUploadExceed"
           :file-list="fileList"
           :action="BASE_API+'/admin/vod/video/upload'"
           :limit="1"
           class="upload-demo"&gt;
    &lt;el-button size="small" type="primary"&gt;上传视频&lt;/el-button&gt;
    &lt;el-tooltip placement="right-end"&gt;
        &lt;div slot="content"&gt;最大支持1G，&lt;br&gt;
            支持3GP、ASF、AVI、DAT、DV、FLV、F4V、&lt;br&gt;
            GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、&lt;br&gt;
            MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、&lt;br&gt;
            SWF、TS、VOB、WMV、WEBM 等视频格式上传&lt;/div&gt;
        &lt;i class="el-icon-question"/&gt;
    &lt;/el-tooltip&gt;
    &lt;/el-upload&gt;
&lt;/el-form-item&gt;<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>数据定义：</p>
<pre class="line-numbers language-javascript" data-language="javascript"><code class="language-javascript">fileList<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span><span class="token comment">//上传文件列表</span>
<span class="token constant">BASE_API</span><span class="token operator">:</span> process<span class="token punctuation">.</span>env<span class="token punctuation">.</span><span class="token constant">BASE_API</span> <span class="token comment">// 接口API地址</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span></span></code></pre>
<p>方法定义：</p>
<pre class="line-numbers language-javascript" data-language="javascript"><code class="language-javascript"><span class="token comment">//=================视频管理============</span>
    <span class="token comment">//成功回调</span>
    <span class="token function">handleVodUploadSuccess</span><span class="token punctuation">(</span><span class="token parameter">response<span class="token punctuation">,</span> file<span class="token punctuation">,</span> fileList</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span>video<span class="token punctuation">.</span>videoSourceId <span class="token operator">=</span> response<span class="token punctuation">.</span>data<span class="token punctuation">.</span>videoId
      <span class="token keyword">this</span><span class="token punctuation">.</span>video<span class="token punctuation">.</span>videoOriginalName <span class="token operator">=</span> file<span class="token punctuation">.</span>name
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token comment">//视图上传多于一个视频</span>
    <span class="token function">handleUploadExceed</span><span class="token punctuation">(</span><span class="token parameter">files<span class="token punctuation">,</span> fileList</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span>$message<span class="token punctuation">.</span><span class="token function">warning</span><span class="token punctuation">(</span><span class="token string">'想要重新上传视频，请先删除已上传的视频'</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token comment">//删除之前确认操作</span>
    <span class="token function">beforeVodRemove</span><span class="token punctuation">(</span><span class="token parameter">file<span class="token punctuation">,</span> fileList</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">$confirm</span><span class="token punctuation">(</span><span class="token template-string"><span class="token template-punctuation string">`</span><span class="token string">确定移除 </span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">${</span>file<span class="token punctuation">.</span>name<span class="token interpolation-punctuation punctuation">}</span></span><span class="token string">？</span><span class="token template-punctuation string">`</span></span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span>
    <span class="token comment">//确定删除</span>
    <span class="token function">handleVodRemove</span><span class="token punctuation">(</span><span class="token parameter">file<span class="token punctuation">,</span> fileList</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
      video<span class="token punctuation">.</span><span class="token function">deleteVideo</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>video<span class="token punctuation">.</span>videoSourceId<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token parameter">res</span><span class="token operator">=&gt;</span><span class="token punctuation">{</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>$message<span class="token punctuation">.</span><span class="token function">success</span><span class="token punctuation">(</span><span class="token string">"视频删除成功"</span><span class="token punctuation">)</span>
        <span class="token comment">//清空数据</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>video<span class="token punctuation">.</span>videoSourceId <span class="token operator">=</span> <span class="token string">''</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>video<span class="token punctuation">.</span>videoOriginalName <span class="token operator">=</span> <span class="token string">''</span>
        <span class="token keyword">this</span><span class="token punctuation">.</span>fileList<span class="token operator">=</span><span class="token punctuation">[</span><span class="token punctuation">]</span>
      <span class="token punctuation">}</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span><span class="token punctuation">,</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h1 id="微服务调用"><a href="#微服务调用" class="headerlink" title="微服务调用"></a>微服务调用</h1><p>当我们删除章节或者课程时，我们也需要删除对应的存储在阿里云的视频。而我们章节或课程的操作是在service_edu工程中，而对阿里云视频的操作是在service_vod工程中，如何在一个模块调用用另一个模块的方法，这就用到微服务了。当然，微服务的作用远不止这么点。我在之前的<a target="_blank" rel="noopener" href="https://blog.jy741.cn/2020/12/11/572.html">《2020最新SpringCloud微服务最强入门》</a>中详细介绍过，一些基本操作这里不过多赘述。</p>
<h2 id="1-搭建Nacos服务"><a href="#1-搭建Nacos服务" class="headerlink" title="1.搭建Nacos服务"></a>1.搭建Nacos服务</h2><p>Nacos 是阿里巴巴推出来的一个新开源项目，是一个更易于构建云原生应用的动态服务发现、配置管理和服务管理平台。Nacos 致力于帮助您发现、配置和管理微服务。Nacos 提供了一组简单易用的特性集，帮助您快速实现动态服务发现、服务配置、服务元数据及流量管理。Nacos 帮助您更敏捷和容易地构建、交付和管理微服务平台。 Nacos 是构建以“服务”为中心的现代应用架构 (例如微服务范式、云原生范式) 的服务基础设施。</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/04-nacos介绍.png" alt="04-nacos介绍"></p>
<p>先下载并启动Nacos。</p>
<p>把service-edu微服务注册到注册中心中，其他工程步骤相同</p>
<p>（1）配置Nacos客户端的pom依赖</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token comment">&lt;!--服务注册--&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.springframework.cloud<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>spring-cloud-starter-alibaba-nacos-discovery<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>（2）配置application.properties，在客户端微服务中添加注册Nacos服务的配置信息</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties"># nacos服务地址
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span></span></code></pre>
<p>（3）在客户端微服务启动类中添加注解</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@EnableDiscoveryClient<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（4）启动已注册的微服务，可以在Nacos服务列表中看到被注册的微服务</p>
<h2 id="2-服务调用Feign"><a href="#2-服务调用Feign" class="headerlink" title="2.服务调用Feign"></a>2.服务调用Feign</h2><p>注册进注册中心，接下来我们可以通过服务调用来实现删除课时的同时删除云端视频</p>
<p>（1）在service_edu模块添加pom依赖</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token comment">&lt;!--服务调用--&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.springframework.cloud<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>spring-cloud-starter-openfeign<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>（2）在调用端的启动类添加注解</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@EnableFeignClients<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（3）创建包和接口</p>
<p>@FeignClient注解用于指定从哪个服务中调用功能 ，名称与被调用的服务名保持一致。</p>
<p>@GetMapping注解用于对被调用的微服务进行地址映射。</p>
<p><strong>@PathVariable注解一定要指定参数名称，否则出错</strong></p>
<p>@Component注解防止，在其他位置注入CodClient时idea报错</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@FeignClient(name = "service-vod",fallback = VodFileDegradeFeignClient.class)
@Component
public interface VodClient {

    //根据视频id删除阿里云视频
    //@PathVariable注解一定要指定参数名称，否则出错
    @DeleteMapping("vod/video/delete/{id}")
    public R delete(@PathVariable("id") String id);

    //批量删除视频
    @DeleteMapping("vod/video/delete-batch")
    public R deleteBatch(@RequestParam("videoIdList") List&lt;String&gt; videoIdList);
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>（4）在调用端的VideoServiceImpl中调用client中的方法</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Override
public boolean removeVideoById(String id) {

    //查询云端视频id
    Video video = baseMapper.selectById(id);
    String videoSourceId = video.getVideoSourceId();
    //删除视频资源
    if(!StringUtils.isEmpty(videoSourceId)){
        vodClient.removeVideo(videoSourceId);
    }

    Integer result = baseMapper.deleteById(id);
    return null != result &amp;&amp; result &gt; 0;
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h2 id="3-完善删除课程业务"><a href="#3-完善删除课程业务" class="headerlink" title="3.完善删除课程业务"></a>3.完善删除课程业务</h2><p>vod业务实现批量删除视频</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Override
public void removeVideoList(List&lt;String&gt; videoIdList) {
    try {
        //初始化
        DefaultAcsClient client = AliyunVodSDKUtils.initVodClient(
            ConstantPropertiesUtil.ACCESS_KEY_ID,
            ConstantPropertiesUtil.ACCESS_KEY_SECRET);

        //创建请求对象
        //一次只能批量删20个
        String str = org.apache.commons.lang.StringUtils.join(videoIdList.toArray(), ",");
        DeleteVideoRequest request = new DeleteVideoRequest();
        request.setVideoIds(str);

        //获取响应
        DeleteVideoResponse response = client.getAcsResponse(request);

        System.out.print("RequestId = " + response.getRequestId() + "\n");

    } catch (ClientException e) {
        throw new GuliException(20001, "视频删除失败");
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>edu模块VideoServiceImpl</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Override
public void deleteByCourseId(String id) {
    //根据课程id查询所有视频列表
    QueryWrapper&lt;EduVideo&gt; queryWrapper =new QueryWrapper&lt;&gt;();
    queryWrapper.eq("course_id",id);
    //只需要查视频id
    queryWrapper.select("video_source_id");
    List&lt;EduVideo&gt; eduVideos = baseMapper.selectList(queryWrapper);

    //得到所有视频列表的云端原始视频id
    List&lt;String&gt; videoSourceIdList = new ArrayList&lt;&gt;();
    for (EduVideo eduVideo : eduVideos) {
        String videoSourceId = eduVideo.getVideoSourceId();
        if(!StringUtils.isEmpty(videoSourceId)){
            videoSourceIdList.add(videoSourceId);
        }
    }

    //调用vod服务删除远程视频
    if(videoSourceIdList.size()&gt;0){
        vodClient.deleteBatch(videoSourceIdList);
    }

    //删除video表示的记录
    QueryWrapper&lt;EduVideo&gt; wrapper = new QueryWrapper&lt;&gt;();
    wrapper.eq("course_id",id);
    baseMapper.delete(wrapper);
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<h2 id="4-Spring-Cloud调用接口过程"><a href="#4-Spring-Cloud调用接口过程" class="headerlink" title="4.Spring Cloud调用接口过程"></a>4.Spring Cloud调用接口过程</h2><p>Spring Cloud 在接口调用上，大致会经过如下几个组件配合：</p>
<p><strong><code>Feign</code> ——-&gt;<code>Hystrix</code> —&gt;<code>Ribbon</code> —&gt;<code>Http Client``（apache http components 或者 Okhttp）</code></strong> 具体交互流程上，如下图所示：</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/image-20210126150557862.png" alt="image-20210126150557862"></p>
<p>（1）接口化请求调用当调用被@FeignClient注解修饰的接口时，在框架内部，将请求转换成Feign的请求实例feign.Request，交由Feign框架处理。</p>
<p>（2）Feign ：转化请求Feign是一个http请求调用的轻量级框架，可以以Java接口注解的方式调用Http请求，封装了Http调用流程。</p>
<p>（3）Hystrix：熔断处理机制 Feign的调用关系，会被Hystrix代理拦截，对每一个Feign调用请求，Hystrix都会将其包装成HystrixCommand,参与Hystrix的流控和熔断规则。如果请求判断需要熔断，则Hystrix直接熔断，抛出异常或者使用FallbackFactory返回熔断Fallback结果；如果通过，则将调用请求传递给Ribbon组件。</p>
<p>（4）Ribbon：服务地址选择 当请求传递到Ribbon之后,Ribbon会根据自身维护的服务列表，根据服务的服务质量，如平均响应时间，Load等，结合特定的规则，从列表中挑选合适的服务实例，选择好机器之后，然后将机器实例的信息请求传递给Http Client客户端，HttpClient客户端来执行真正的Http接口调用；</p>
<p>（5）HttpClient ：Http客户端，真正执行Http调用根据上层Ribbon传递过来的请求，已经指定了服务地址，则HttpClient开始执行真正的Http请求</p>
<h2 id="5-熔断器Hystrix"><a href="#5-熔断器Hystrix" class="headerlink" title="5.熔断器Hystrix"></a>5.熔断器Hystrix</h2><p>Hystrix 是一个供分布式系统使用，提供延迟和容错功能，保证复杂的分布系统在面临不可避免的失败时，仍能有其弹性。</p>
<p>改造service-edu模块</p>
<p>（1）在service的pom中添加依赖</p>
<pre class="line-numbers language-markup" data-language="markup"><code class="language-markup"><span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.springframework.cloud<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>spring-cloud-starter-netflix-ribbon<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span>

<span class="token comment">&lt;!--hystrix依赖，主要是用  @HystrixCommand --&gt;</span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>dependency</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>groupId</span><span class="token punctuation">&gt;</span></span>org.springframework.cloud<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>groupId</span><span class="token punctuation">&gt;</span></span>
    <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>artifactId</span><span class="token punctuation">&gt;</span></span>spring-cloud-starter-netflix-hystrix<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>artifactId</span><span class="token punctuation">&gt;</span></span>
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;/</span>dependency</span><span class="token punctuation">&gt;</span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>（2）在配置文件中添加hystrix配置</p>
<pre class="line-numbers language-properties" data-language="properties"><code class="language-properties">#开启熔断机制
feign.hystrix.enabled=true
# 设置hystrix超时时间，默认1000ms
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=6000<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span></span></code></pre>
<p>（3）创建熔断器的实现类</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@Component
public class VodFileDegradeFeignClient implements VodClient{
    @Override
    public R delete(String id) {
        return R.error().message("删除视频失败");
    }

    @Override
    public R deleteBatch(List&lt;String&gt; videoIdList) {
        return R.error().message("删除视频失败");
    }
}<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre>
<p>（4）修改VodClient接口的注解</p>
<pre class="line-numbers language-java" data-language="java"><code class="language-java">@FeignClient(name = "service-vod", fallback = VodFileDegradeFeignClient.class)<span aria-hidden="true" class="line-numbers-rows"><span></span></span></code></pre>
<p>（5）测试熔断器效果</p>
<p><img src="https://pluto-1300780100.cos.ap-nanjing.myqcloud.com/img/image-20210126150859106.png" alt="image-20210126150859106"></p>
<h1 id="结语"><a href="#结语" class="headerlink" title="结语"></a>结语</h1><p>至今我还在天上御剑，懂不懂什么叫做光速坠机啊！！还需要马大叔教你吗？？？</p>
<iframe frameborder="no" border="0" marginwidth="0" marginheight="0" width="330" height="86" src="//music.163.com/outchain/player?type=2&amp;id=1489342321&amp;auto=0&amp;height=66"></iframe>
                
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